A study supported by the U.S. Air Force Research Laboratory (AFRL) has validated the reliability of PanX software in calculating thermal history and residual stress for metal 3D printing. The research compared simulation and experimental measurement data for Ti-6Al-4V titanium alloy across a full LPBF build space with multiple parts printed simultaneously. PanX achieved interlayer temperature calculation deviations ranging from 2% to 14%, and employed a novel P-integral method to identify potential crack zones. The software is based on a multigrid approach that combines multiple transient solutions to balance accuracy and computational efficiency. As noted by the Chief Engineer at PanOptimization, additive manufacturing cannot reach full industrial maturity without reliable, physics-based models. The findings demonstrate that physics-based models can identify and mitigate risks such as part deformation and cracking before actual printing, which is critical for process qualification in aerospace and defense applications. PanX's simulation capabilities enable manufacturers to reduce material waste, accelerate product development cycles, and lower certification costs, marking a shift from trial-and-error methods to physics-based digital production.